title: End-tidal carbon dioxide during thoracotomy. Its relation to blood level in adults and children.
abstract: The concentration of carbon dioxide in end-tidal gas was compared with the tension in arterial or superior vena caval blood during thoracotomy in twelve patients. In six adults requiring pulmonary resection, one-lung anaesthesia did not change the difference between the two measurements. In six children in whom a systemic to pulmonary arterial anastomosis was being created to improve pulmonary blood flow impaired by cyanotic congenital heart disease, occlusion of the pulmonary artery caused in increase in the blood-end-tidal carbon dioxide gradient. This change was particularly marked in two neonates and was of sufficient magnitude to render end-tidal monitoring unreliable in these circumstances.
mesh_terms: D000328:Adult; D000368:Aged; D001157:Arterial Occlusive Diseases / Q000503:physiopathology; D001166:Arteriovenous Shunt, Surgical; D002245:Carbon Dioxide / Q000097:blood / Q000502:physiology*; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D011013:Pneumonectomy; D011651:Pulmonary Artery / Q000503:physiopathology; D012119:Respiration; D013990:Tidal Volume
chemical_list: D002245:Carbon Dioxide